Unfortunately I just sold off all three of my BGS 10 1952 Mantles; you should've asked me last week. Sorry.
The cards are actually for a student of mine. His grandfather got him started on the set. I filled in most of the gaps of his set from what I had lying around; just missed by those three cards.
As for those two cards which I am sure you are frustrated that you can't find, I'm sorry but I can't help you as of yet. I say as of yet because last week Kim had a "friend" sell her five 3,000 count boxes of cards all from 1986 through 1993. It's going to take me forever to go through them. As yes, because of my personality I will go through them and catalogue them. I know she thought she was doing me a favor but sheesh...friends don't sell friends 80s and 90s junk.
I'll let you know when I'm able to make it to Eastside. It's amazing how little time I have these days with work family demands.